Long draft spinning



J. L. TRUSLOW LONG- DRAFT SPINNING Filed Jan. 2, 1934 2 SheetsSheet lINVENTOR.

Wk. 1W I WYM+Q M A TTORNEY S.

Nov.'12, 1935. r J. L. TRUSLOW 2,020,483

' LONG DRAFT SPINNING Filed Jan. 2, 1934 2 Sheets-Sheet 2 g A'SINVENTOR.

A TTORNEYS.

Patented Nov. 12, 1935 sTA'r s LONG DRAFT SPINNING v James L. Truslow,Whitinsville, Mass, assignor to Whitin Machine Works, Whitinsville,Mass, a corporation of Massachusetts Application January 2, 1934, SerialNo. 704,873

8 Claims. (Cl. 119-431) The invention relates to apron guides for Casatostituted of slender rods or cross pins, removably carried on removableframes called cradles which rest on the rolls themselves and hold theaprons so that they run close to the bites of the next succeeding pairsof rolls. Inasmuch as the aprons l circle both the rolls and the crosspins or bearings, the process of removing the cradles so as to gainaccess to underlying parts for cleaning orrepair, requires that thecradles be more or less taken apart, which is a slow and somewhatcomplicated operation involving the risk that some of the parts may dropinto the machine or become lost or misplaced or improperly replaced.According to this invention the cradle with their apron-bearings and alltheir associated parts are organized each into a unitary structure,readily separable as such from its apron or aprons and from the rollswithout risk of losing any part andalso affording additional advantagesas will presently become apparent. p The principles involved in thisinvention can be variously embodied, as will also presently appear. Thedrawings hereto represent the form at present preferred.

Fig. 1 being a vertical section through a roll head of a spinning frame,on line 1-1 of Fig. 2; Fig. 2 a top plan in the direction of arrow 2;

moved;

Fig. 4 a side view of Fig. 3, illustrating the a cradle lock;

Fig. 5 the blank from which the preferred form of cradle is stamped;

Fig. 6 a detail of the guard, and I Fig. 7 a perspective of one of theapron-bearing members.

' The roll stand and drawing rolls will be recognized as conforming tothe Casablancasdesign being of the type having upper and lower apronsbetween which the roving is carried and drafted,

but the invention is not limited to such type except as pointed out inthe claims. The draftin system comprises three pairs of rolls ofsuccessively greater surface velocities and marked ii-it, l3--l4 andwhich will be understood. to be appropriately i5-i6, respectively, and

weighted as usual. The intermediate rolls which may be geared together,if desired, though not so shown, are respectively circled by the endlessleather belts or aprons 25 and 26, and the for- Ward end of each apronis'supported by and 5 7 travels upon an apron-bearing represented by apair of studs or fingers 35 referred to below. These studs arepermanently attached'to the side or check plates 35 which are rigidlyjoined together by a riveted cross bar 33 and a flat in- 10 tegral crossplate 32. The lower margins of the side plates are recessed or notchedas at E0 to fit over or rest upon the bottom draft roll iii. The uppermargins of the-side plates are also notched as at ti to receive the toproll it, which 15 is set as usual in the slots of its cap bars 22. Thedetail of the cradleframe will be clear-from the blank Fig. 5 from whichit is formed. 1

Proper placement of the cradle on the bottom roll is insured by means ofa guard 50 pivoted to 20 the cheek 3i at 5!, and provided with a part orparts adapted to coact with the bottom roll in the bottom notch so as tocontrol the entrance of the top roll into the top notch of the cradle.Forthis purpose the guard 50 is so arranged as to be en- 25 gaged by thebottom roll when the latter has fully entered the bottom notch and bemoved thereby so that its upper end 5% isshifted out of alinement withthe top notch and only until such movement can the top roll be insertedin the top notches. In 30 all other positions of the guard it obstructssuch placement ofthe .toproll. By this'device the cradle must be fullyseated on the bottom roll before the top roll can be placed in position.The guard 50 has also a hook portion 53 whlchmore 35 or less closes thebottom notch t0, when the bottom roll is within it, thus also lookingthe cradle to the roll andpreventing top roll insertion until suchlocking has been effected. By employing one guard on the inner face ofeach cheek plate and i0 giving them both such contour that their hooksspan the entrances to the'bottom notches, they present extended flat andsmooth surfaces for the edges of the aprons to rub against at the bottomnotches aswell as elsewhere and this guides the 45 above described formthe subject of a copending application,-Serial No. 680,692, filed July1'7, 1933.

The invention of the present case concerns the apron-bearings, which arepermanently fastened to the cradle frames instead of being loose membersor cross-pins as heretofore and the invention consists in the provisionof a space or gap in association with such permanent apron-bearingsthrough which the apron which normally circles it can be passed and thusseparated from the cradle. Such gap isformed in the illustrated case bythe space between the proximate ends of the pair of fingers 35constituting the apron-bearing for each apron and this space is largeenough so that by slightly buckling or bending the apron it can beslipped out of position and off the ends of the fingers and thus removedthrough the gap. Although shown at the center, the exit space or gap canbe at one side or the other and still provide the convenience of quickremovability without the use of loose parts requiring to be taken apartand separately manipulated, which is to say, that the fingers 35 are notnecessarily of equal length though so shown and that one or the other ofthem can, if desired, be so long as to perform the most or all of theapron supporting function. Specially satisfactory support however isafforded by two spaced apart inward projections such as the bearingmembers 35, which engage only the side portions of the aprons and giveno direct support to their central portions. It is found that thetexture of the leather or material commonly used for these aprons issuch that in thus spanning a central gap they exert a desirably constantand also well distributed pressure upon the roving. Accordingly the gapmay be wide and the studs short. Although the bearing members have beenreferred to as studs or fingers and shown as of oblong section andriveted to the side plates, it will be apparent that their describedfunctions will be properly'performed if made of any appropriateconfiguration integral or otherwise, so long as space is made orprovided through which the apron may be passed. However they arepreferably formed of oblong section, the lower faces of the upperfingers being fiat and parallel to the upper faces of the lower fingers,inamuch as this makes for better contact of the aprons with the rovingand in practice runs clean of fly.

The guard members 50 are provided with extensions which occupy thespaces between the studs and above and below them when the guards are upand thereby provide smooth faces for contact with the edges of theaprons to reduce wear and assist in steadying them on their bearings.

With the guards and apron-bearings both per- Q separated from each otherby a space through which such apron may be removed from the cradle.

2. A cradle for long-draft spinning aprons comprising a frame composedof united side 5 plates having top and bottom notches to receive the topand bottom draft rolls and having upper and lower pairs of inwardlyprojecting bearing members respectively constituting apron bearings forthe top and bottom aprons, 'of said rolls and circled respectivelythereby, the members of each pair being separated by a gap suited forthe removal of the apron therefrom.

3. A cradle for long-draft spinning machines comprising side platesrigidly united to form-av frame and provided with top and bottom notchesfor the top and bottom draft rolls, apron bearings respectively circledby the aprons of said draft rolls, and composed of inward projectionsrigidly fastened to said frame, the inner ends of 20 said projectionsbeing unobstructed for apron removal and the cross-sections of saidprojections being oblong.

4. In long-draft spinning mechanism, the combination of pairs of draftrolls of successive- 25 ly greater surface velocity, an apron on a rollof less velocity delivering to a pair of rolls of higher velocity, and abearing for said apron ccmpr-ising opposed members supporting the sideportions only of said apron.

5. In ion-draft spinning, mechanism, the combination of pairs of draftrolls of successively greater surface velocity, coacting-aprons on apair of less velociiyarranged to deliver the reving to a pair of rollsof higher velocity, and short 35 bearings for said aprons engaging onlythe side portions thereof.

' 6. A cradle for long-draft spinning aprons comprising a frame withapron-guiding side wall members respectively shaped to be removably 40seated between draft 1 rolls and apron-bearing meanspermanently attachedto said frame, said means being circled by the apron and affording aspace at the forward end of the apron permitting removal of the latterfrom said bearing 45 means and frame.

'7. A cradle for long-draft spinning aprons comprising a frame composedof apron-guiding side members formed to seat removably in fixed relationto a bottom draft roll and shaped to ac- 60 commodaie the complementarytop roll, upper and lower aprons encircling said rolls and apronbearingmeans constituting permanent parts of the cradle also encircled by therespective aprons, both said means being respectively associated 55 withopenings at the forward ends of the aprons for the separation of thelatter from the frame, said openings intervening between the frame sidemembers and forming exits through whichthe aprons may be passed.

8. A cradle for long-draft spinning aprons comprising a frame shaped toreceive top and bottom draft rolls, apron bearings permanently mountedthereon circled by aprons on said rolls,

